# Chi square rules

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*2020-03-29 05:56*

Apr 25, 2013 Decision ruleChi Square question? The following hypotheses are given: H0: Forty percent of the observations are in category A, 40 percent are in B, and 20 percent are in C. H1: The distribution of the observations is not as described in H0.The chisquare distribution (also called the chisquared distribution) is a special case of the gamma distribution; A chi square distribution with n degrees of freedom is equal to a gamma distribution with a n 2 and b 0. 5 (or 2). chi square rules

And here is my answer: 1. The assumption of the Chisquare test is not that the observed value in each cell is greater than 5. It is that the expected value in each cell is greater than 5. (The expected value for each cell is row totalcolumn totaloverall total).

Chi Square Test. A Chi Square test also called as Chisquared is a statistical hypothesis test that has a chisquare distribution when the null hypothesis is true. This test is most commonly used to observe what results are obtained by comparing given data with the expected data. This test is conducted to prove that there will be no change Chisquare goodnessoffit test. Ruleofthumb for number of groups One ruleofthumb suggests using the value as a good starting point for choosing the number of groups. Another wellknown ruleofthumb requires every group to have at least five data points.**chi square rules** Chisquared test. Also considered a chisquared test is a test in which this is asymptotically true, meaning that the sampling distribution (if the null hypothesis is true) can be made to approximate a chisquared distribution as closely as desired by making the sample size large enough.